Re: **cooling system issue**
I found that compression should be about 150psi in a 250 chevy.
Mine is: 130/120/150/120/120/120
I did see antifreeze on the 1st and 2nd plugs and unfortunately a little discoloration on the oil dipstick. I'm not sure why there is such a variation in the compression PSI if it's all suppose to be 150 like I've read.
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